open access

https://hdl.handle.net/2115/74867

Thermoelectric properties of Fe-Mn-Si alloys and compound Fe3Si doped with Mn and Mn and V

日本語

iron-vanadium-silicon alloy

1999-11-01

日本金属学会

Journal of the Japan Institute of Metals

63(11)

1435-1442

Thermoelectric properties of Fe3Si with the DO3 structure where some Fe were replaced with Mn and V were examined. By adding 5 mol%Mn or V, the Seebeck coefficients, α, reach the maximum values of about+22.5 μV/K, while they decreased to a large negative value by the further replacement of Fe by these transition elements. The minimum values of α were −36 μV/K and −45 μV/K at Fe-30 mol%Mn-25 mol%Si and Fe-20 mol%V-25 mol%Si, respectively. These values are smaller than the minimum value reported for the iron-based alloys. The compositional dependency of α corresponds to the fact that the added transition metal atoms replaced iron atoms at a particular site in the DO3 lattice. By combining an approximate model approximation suitable for simple metals and the density of state reported, however, the obtained compositional dependency of thermoelectricity could not be explained. The absolute values of α in the Fe-Mn-Si system were small, both in the samples with the α-Fe solid solution and with the γ-Fe solid solution.

学術雑誌論文

Version of Record

0021-4876

1880-6880

AN00062446